Composition shingle



June 29, 1943. T MGM/0y 2,323,230

COMPOSITION SHINGLE Filed Feb. 28, 1941 INVENTOR' 7, usu M 4327). BY If) I ATTOR N EYS- posed slotted so as to Patented June 29, 1943 UNITED STATES PATENT OFFICE COMPOSITION SHINGLE Trush McAvoy, Cincinnati, Ohio Application February 28, 1941, Serial No. 381,092

3 Claims.

.. are ordinarily made of heavy asphalt saturated felt having an asphalt coating thereon in which is imbedded particles of colored slate or other granular material which obscures the asphalt.

. A difliculty attendant upon laying of strip shingles is due to water being dammed up on the roof beneath the strip shingles by the back edge thereof. Water which gets to the back edge of strip shingles will be conducted for quite a distance and held back from flowing away by an amount which the thickness of the shingle material will keep from flowing away. Strip shingles are not ordinarily laid with spacing between the lateral edges but are butted against each other laterally, and in thi way water may be conducted along th roof for many feet and held against running away. stances some hole in the sub-structure will form a passage for water which will run through the roof into the building below. It is quite difficult to trace the cause of the leak under such circumstances as the water has perhaps run for quite a distance along the roof, before finding a passageway for escape.

A frequent source of such leaks is at the valleys where the roof surfaces meet at an angle.

A valley strip usually of metal is laid in the valley and the strip shingles simply extend over the edge of the valley strip. This leaves exposed the space just above the back end of each strip shingle, and water can thus get into the space and be dammed up, as above described.

In order to avoid this difliculty and make a strip shingle which will be inexpensive, and laid as usual, I have provided for a bevelling off of the back edge of each strip shingle to a fairly thin edge. Thus water which can get into the space above any shingle on the roof will drain away and not run along the protected or dammed up line which a. regular full thickness back edge will provide against the roof.

By this simple expedient, I do not depart from the economy of making the strip shingles or laying them except for the slight cost of stamping, bevelling or otherwise trimming the back edge of each shingle to a sharp edge, the bevel being only on the uppermost or face side of the shingle and Often under such circumthe underside of the shingle without break so that it can be nailed down fiat on the roof.

I accomplish my object by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and the novelty residing therein will be set forth in the claims that follow to which reference is hereby made.

In the drawing:

Figure 1 is a fragmentary perspective illustrating a valley of a roof, the roof being covered with my improved shingles.

Fig. 2 is a sectional view taken along the line 2-2 of Fig. l.

Fig. 3 is a perspective view showing my improved shingle, and 1 Fig. 4 is a perspective illustrating a modification of my shingle.

In Fig. 3 I have illustrated a strip shingle I 0 having slots H to provide a finished appearance of individual shingles. The upper edge of the is beveled as at It. Referring now to Fig.

ing l3 and shingles I. It will here be apparent that rain water or other condensed moisture which may collect beneath the shingles, as in the space M, will not be retained therein but will be immediately drained away due to the beveled edge l2 of the succeeding lower shingle. Also the water will not be conducted along the upper edge of the shingle to a location remote from the source of entry as does occur with the conventional shingle having a square. upper edge which edge, in conjunction with the inclined roof surface, forms a V-shaped trough or channel preventing immediate escape of the water.

Th strip shingles, as already noted, have a surface resulting from imbedded particles of colored slate or other granular material to obscure the black color of the asphaltic coating common to composition shingles. This permit seepage away of the water without damming effect by superimposed shingle strips.

In Figure 1 a valley flashing is indicated at l5 and the arrows indicate downward flow of water therein. It is to be noted that some of the water flowing down the valley is certain to strike the upper edges of the shingles and be diverted from the desired course of flow. With my improved formation this water will be immediately drained from beneath the shingles.

In Figure 4 the shingle Illa has the usual beveled upper edge 42 and is also provided with channels or depressed portions IS. The channels l6 serve to facilitate drainage of water and will be unobserved in the finished structure due to overlapping of successive shingles.

It will be understood that I am not to be limited to the strip shingle type of roofing as shown in the drawing but that my invention is readily applicable to roofing slabs or strips not demarked to simulate a series of individual shingles and to those having irregular lower edges for decorative purposes. My invention will also have utility in the normal width individual composition shingle. These are interspaced throughout as laid and between each shingle there is thus a normally adequate water escape channeLbut the escape of water would be prevented by the edge of the underlapped shingles and so on down the roof. Thus I am not to be limited to the precise formation as shown and described but by what I claim to be new and patentable.

It is not necessary that saturated and coated roofing felt he the composition used according to m invention. althou h there must be a. rou hened surface on the underlying faces of the composition units or water cannot escape and seep to the outer surface of the roof.

In the claims that follow I use the term strip shingle to indicate not only roofing strips which are cut to simulate a serie of interspaced indi- -vidual shingles, but strips having other types of exposed edges, but having a width factor which makes them readily distinguishable from normal size wooden or composition individual shingles which are laid with lateral interspacing.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is: 3 1. A composition strip shingle having the body portion thereof which is overlapped in laying of substantially uniform thickness and an upper edge for said portion which is sharply slanted from the top surface toward the bottom surface thereof, thus presenting substantially no water retaining edge along the upper line of the hingle as laid and indentations interspaced along said upper edge extending into the sloped oif portion, and depending thence toward the exposed part of the shingle, to serve as water drainage channels.

-2. A composition strip shingle having its area to be exposed in laying out to simulate individual spaced shingles, and having its upper portion to be overlapped in laying of substantially uniform thickness except at the upper edge where the same is sharply sloped off from the top face toward the bottom face, the apex of the slope being at the upper edge, for the purpose described and indentations interspaced along said upper edge extending into the sloped off portion, and depending thence toward the exposed part of the shingle, to serve as water drainage channels.

3. A composition shingle having the body portion thereof which is overlapped in laying of substantially uniform thickness and an upper edge for said portion which is sharply slanted from the top surface toward the bottom surface thereof, thus presenting substantially no water retaining edge along th upper line of the shingle as laid and indentations interspaced along said upper edge extending into the sloped oi! portion, and depending thence toward the exposed part of the shingle, to serve as water drainage channels.

TRUSH McAVOY. 

